Sand-reel drive for well-drilling equipment



' June' 3 1924- R. O. CRAIG SAND REEL DRIVE FOR WELL DRILLING EQUIPMENT Filed Sept. '7, 1 2 Sheets-Sheet 1 June 3, 19% 1,496,149

R. O. CRAIG SAND REEL DRIVE FOR WELL DRILLING EQUIPMENT Filed Sept. '7, 1922 2 SheeLs Sheet 3 firm 1 02 Foul/v0 0. CPA/6;

Patented June 3, 1924.

E'D PAIEN'E EFHLCifSE.

BOLA'NIXO. GRAIG, -OF- QRCU'TTJGAL IFORNIA, -ASSIGNOR TO "HEN RIEITA CRAIG, OF LOS -ANGELES, GALIFO'RNIA.

' SAND-REEL :DRIVE :EQR WELL-DRILLING 1EQTJ"I]EMEN'I'.

eAppl ication filed september 7,, 1922. Serial -N 0. 586,662.

7 Toall. whom it may concern:

Be it known-that I, Ro ANo O. ORAIG,,;Q citizen of the United States, residing at Orcutt, in the county of SantafBarhara .and

State of Califor11ia,-have inventednmew and useful Sand-Reel Drivefor YVelLDrilling Equipment, of which the'following ism specification.

My invention; relates .to hoisting devices 10 which; are employed in the :drilling .ofwe'lls and which are particularly employed 7 in oil well .drilling.

In the present form of equipmentasand reel is provided-on,.which .is, wound. a, light cablefor the. -;purpose ,of hoisting articles such as ,sand hailers. .Thissand, reel .is mounted on a shaft. together -.witl1 a friction wheelandis driven? by the contact? of this 'ifllCtlOlLWhfiGl with. .the-periphery of the hand wheel. .Band wheels, -o.wing to the factthat theymusthe of considerablexliameter are constructed .of \vood,.,and. hle therefore of an inflammable nature which makes 1 them liable-to catch fireor smoke .under the Iacti'ou of. the friction .otthe .sand. reel. friction. wheel thereagainst. .Thisectionofithe friction-wheel. against the :band wheelservcs to; greatly reduce the life thereof owing to the .severe wear incurred bythe friction he-,

tween thetwo members .furthermore. the friction. wheel operatesagainst thev belt re ceiving. surface. of .the rim of itheband wheel. and .deleteriously afl'ects,.it., to. such. an

extent that. the beltingis injured, by the splinters and ;.abrasions. which are ipresent on the periphery-of the .bandwheehflthus reducin g theiwearing life of the i-helt.

{It is an. object. of ,iny zinvention, to.,pro-

,. wide. an improved ,fdrivefor. sand. reelstand other hoisting devices. .of. a similar nature,

which imay be .moiuited upon the hand;- wheel shaft and operated through the engagement .of cooperating clutch elements .whi'ch are v ,.secu red .upon the. drive spro'oket- ..and the band-iwheelshaft.

is. a iur he ,o je t. .of my Ei QRtiQ 2 pr vide 31 impr re ifor to .Sprocket h ting, ass ciate ;ther w th: =1 Q1utch..mem- .benand .a; .braken emhen whicnmay he ,inte- ..gra1ly forme .w th.,th .;d re.sprocket- Th spec fi dvantage o tmyei v nt and ;I further oh'eots thereof will ,be. made jvf sn ihereint. ta

Referring to the drawing which is for ,illustrative purposes .only, F 1 isa plan view showing a VGllClllllmg mg equipped with a. sand wheel embody- -ing. the principles of my invention.

F g.2 is a fragmentary elevation :of the hand wheel shaft with the sand wheeldrive clutch mounted thereupon, taken .as .in- ,dlcaoed by the line 2.2.of Fig. 1, a portion of the drive sprocket heing shown innsection therein.

.{Fig 3 isa fragmentary planviewofa modified form vof-my invention showing a preferred form of practicing the invention.

.in which the operating yoke which. I employ .Wltll. my improved form of sprocket .wheel is manipulated, by-a screw having a'small sprocket mounted thereupon.

In F igt 1 of the drawing I. showa derrick llhaving a platform 12, a bullwheel 1st, and a calf wheel 15;- all situated in accordance with standard practice. Upon aframework 16 of sills 17, a hand. wheel l9..is,sup.ported upon .band wheel shaft, 20 v.which jour ,naled in bearingboxes .22, mounted .upon the upper end-of jack p0sts23. Upon the band wheel shaft 20. a sheare 25 1 serving .as

a tug wheel is. turnably mounted, and is adapted to be driven. fromthe shaft .20; hv

-Ineansof a clutch26splined upon the shaft H 20. and, adapted to he moved..axially:therejupon by means ofa yoke 27.operated-= from ;a-.lcve1 28 mounted upon the platform. 12' by ,imeans of. a; rod 29. The shaft; 520 has. a lso turnably. mounted thereupon ,a calf wheel drive sprocket 32 over. whicha .cha-in33extends to the .calf wheel 15. 'flIhis drive sprocket 32, isjalso drivenjtrom; the shaft-I20 .hy the; engagement of the clutch '26. therewith. such construction being the. subject of a companionapplication ,for-patent. Serial :;N0...5se,ee1.

.Inst a ofempl yi -ghe udmnatr'fri :tion ,.-wh,eel, for driving the ,sandwheel -35, .a sprocket {Ed-hereinafter termed the. driven sprocket, iis ;keye,d. upon the sand; reel ,Ishaft37. TUpon the,bandwheeitsheftgao in alignment with the driven sprocket 36 a sand reel drive sprocket 39 is turnably mounted.

As shown in Fig. 2 the drive sprocket 39 is provided with a cylindrical extension 40 and a cylindrical GXLBIlSlOIl 41. The extension 40 is recessed at 42 and receives the friction elements 43 of an expanding clutch 44 which is keyed upon the shaft 20. The clutch 44 is provided with an expander sleeve through which the expansion of the friction elements 4-8 is accomplished by moving it upon the shaft 20 in the direction toward the drive sprocket 39, so that the toggle links 46 connected therewith are thrown into the position. causing the expansion of the elements 43. The expander sleeve may be thrown in and out of engagement by means of a yoke 48 which is operated by means of a rod 49 extending to a lever 50 mounted upon the platform 12 at the convenience of the driller.

The extension 41 of the sprocket provides a cylindrical external face 53 around which a brake band 54 is placed, this brake band being constrictable so as to form frictional contact with the surface 53. by means of a toggle lever 55 having a pull rod 57 extending therefrom to an operating lever 58 which is also mounted upon the platform 12. By means of this arrangement a positive drive for the sand reel is provided, and also a positive braking means having a large brake surface so that the wear thereof will be distributed over a. large area, thus contributing to the wearing capacity thereof.

In the preferred form of my device, as shown in Figs. 3 and 4, a drive sprocket 60 is mounted upon the band wheel shaft in the same position in which the sprocket 39 is shown in the previous figures. The drive sprocket 60 is provided with cylindrical eoncent-ric projections 61 and 62, each having a conical recess 63 and 64 adapted to engagement with members 66 and 6?. The member 67 is mounted upon the interinediate supporting jack post 68 and is, in consequence thereof, stationary. The member 66 is rigidly fastened upon the band wheel shaft 20 so as to be revolved thereby. The drive sprocket 60 is adapted to separately engage either the drive member 66 or the stationary or brake'meinber 67, by moving it laterally upon the shaft so that the desired engagement of the conical formations is accomplished. This movement of the member 60 upon the shaft is accomplished by means of a yoke member 70 which is pivoted at 71 to a base 72 having a vertical supporting arm 73 in which a block 75 receiving the rear end 76 of a screw 77 is mounted. This screw threads into a block 7 9 sustained by the yoke 70 and provides a means for swinging the yoke, either to the right or to the left, by the desired rotation of the screw '7 7 which is aecomplished by means of a sprocket 82 mounted thereupon having a chain extending thereover to a similar sprocket mounted at the derrick platform.

The yoke 70 is provided with rollers 85 whichengage an annular channel 86 in the extension 61 of the drive sprocket 60. By the comparatively fine adjustability of the position of the yoks 70 through the medium of the screw 77, it is possible to hold the drive sprocket 60 at a position intermediate between the members 66 and 67 or to bring it into forcible contact with either of these members. As shown in Fig. 3, the driven sprocket 88 is splined upon the sand reel shaft 89 and is adapted to axial movement bet-ween a pair of collars 90 and 91. so thatthe driven sprocket may adjust itself to alignment with the drive sprocket 60 as the drive sprocket is alternated between the driven and braked positions. This preferred form of my invention will be seen to be of an effectual, yet simple nature and may, therefore, be cheaply constructed and in stalled.

I claim as my invention:

1. In a sand reel drive for well drillin equipment, the combination of: a sand ree shaft; a sprocket secured upon said shaft; a. band' wheel shaft; a band wheel upon said band wheel shaft through which said shaft may be rotated; a drive sprocket upon said band wheel shaft; a chain running over said sprockets, cooperating clutch elements upon said drive sprocket and upon said band wheel shaft; means for engaging said clutch elements; a cylinder formed concentrically upon said drive sprocket; and a brake band adapted to frictionally engage said cylinder.

2. In a sand reel drive for well drilling equipment, the combination of: a sand reel shaft; a sprocket secured upon. said shaft; a band wheel shaft; a band wheel upon said band wheel shaft through which said shaft may be rotated; a drive sprocket upon said band wheel shaft; a chain running over said sprockets, cooperating clutch elements upon said drive sprocket and upon said band wheel shaft; means for engaging said clutch elements; a stationary member; cooperatin brake elements upon said drive clutch an upon said stationary member; and means for bringing said brake elements into functioning relationship.

3. In a. sand reel drive for well drilling equipment, the combination of: a sand reel shaft; 2. sprocketsecured upon said shaft; a band wheel shaft; a band wheel upon said band wheel shaft through which said shaft may be rotated; a drive sprocket upon said band wheel shaft; a chain running over said sprockets, cooperating clutch elements upon one side of said drive sprocket and upon said band wheel shaft; means for engaging said clutch elements; a cylinder formed concentrically upon said drive sprocket, said cylinder being formed upon the opposite side of said drive sprocket from said clutch elements; and a brake band adapted to frictionally engage said cylinder.

4. In a sand reel drive for well drilling equipment, the combination of: a sand reel shaft; a sprocket secured upon said shaft; a band wheel shaft; a band wheel upon said band wheel shaft through which said shaft may be rotated; a drive sprocket upon said band wheel shaft; a chain running over said sprockets, cooperating clutch elements upon one side of said drive sprocket and upon said band wheel shaft; means for engaging said clutch elements; a stationary member; cooperating brake elements upon said drive clutch and upon said stationary member, said brake elements being situated upon the side of said drive sprocket opposite to said clutch elements; and means for bringing said brake elements into functioning relationship.

5. In a sand reel drive for well drilling equipment, the combination of: a sand reel shaft; a sprocket secured upon said shaft; a

band wheel shaft; a band Wheel upon said band wheel shaft through which said shaft may be rotated; a drive sprocket upon said band wheel shaft, said drive sprocket having a clutch element upon one face thereof and a brake element upon the opposite face thereof; a chain running over said sprockets; a clutch element upon said band wheel shaft adapted to cooperate with said clutch element of said drive sprocket; a stationary brake element adapted to cooperate with said brake element of said drive'sprocket; and means for bringing said cooperating elements into functioning relationship.

6. In a drive for Well drilling equipment, the combination of: a drive shaft and a driven shaft; a driven sprocket upon said driven shaft; a drive sprocket turnably mounted upon said drive shaft, said drive sprocket having a clutch element upon one face thereof and a brake element upon the opposite face thereof; a chain running over said sprockets; a clutch element upon said drive shaft adapted to cooperate with said clutch element of said drive sprocket; a stationary brake element adapted to cooperate with said brake element of said drive sprocket; and means for bringing said cooperating elements into functioning relationship.

7. In a drive for well drilling equipment, the combination of: a drive shaft and a driven shaft; a driven sprocket on said driven shaft; a drive sprocket turnably mounted upon said drive shaft; clutch elements upon each side of said drive sprocket; a stationary cooperating clutch element adj acent to one of said clutch elements of said drive sprocket; a cooperating clutch element mounted upon said drive shaft adjacent to the other of said clutch elements of said drive sprocket; and means for moving said drive sprocket axially upon said drive shaft into engagement with either of said cooperating clutch elements.

8. In a drive for well drilling equipment, the combination of: a drive shaft and a driven shaft; a driven sprocket on said driven shaft, said driven sprocket being splined upon said shaft so that axial movement thereof upon said shaft is provided; a drive sprocket turnably mounted upon said drive shaft; clutch elements upon each side of said drive sprocket; a stationary cooperating clutch element adjacent to one of said clutch elements of said drive sprocket; a cooperating clutch element mounted upon said drive shaft adjacent to the other of said clutch elements of said drive sprocket; and means for moving said drive sprocket axially upon said drive shaft into engagement with either of said cooperating clutch elements.

In testimony whereof, I have hereunto set my hand at Orcutt, California, this 15 day of August 1922.

ROLAND O. CRAIG. 

